Veneer-cutting-machine spur bit and block



, June 19, 1923. 1,459,587

' R. H. FOARD VENEER CUTTING MACHINE SPUR BIT AND BLOCK Filed July 31,1922 Fatented June 19, 1 .9230

Ul tlTl -ED STATES ROBERT E. FOARD, OF CLEVELAND, NORTH CAROLINA.

VENEER-CUTTING-MACHINE SPTJ'R BIT AND ".BIidCK.

Application filed July 31, 1922; Serial No. 578,696.

2' 0 all whom may concern:

Be it known that I, ROBERT H. Foam), a citizen of the United States ofAmerica, and resident of Cleveland, in the county of Rowan and State ofNorth Carolina, have invented certain new and useful Improven'ients inVeneenCutting-Machine Spur Bit and lllock, of which the following is aspecification.

This invention relates to veneer cutting machines, and particularly tomechanism to be associated with the rail and each knife for adjustingeach knife with respect to other knives, or with respect to the logbeing cut.

It is an object of this invention to provide novel means whereby theknife can be quickly adjusted to advance or withdraw it with respect tothe log' or wood being treated, while at the same time permitting theknife carrying block to be adjusted longitudinally of the bed plate orrail, novel means being provided for simultaneously clamping the blockto the rail for holding it in different positions of adjustment and forfrictionally holding the blade in its position of adjustment.

It is well known that in cutting veneer, n! the knives have to beadjusted longitudinally of the bed plate when imperfect sections of logsare uncovered or encountered,

the cutting process proceeds. It is possible, of course, by adjustingthe knives to K have them operate clear of the imperfect sections of thelog, and by this means, a comparatively great saving will result, asveneer of less width than the original cut will be taken from the log,whereas if the adjustment is not quickly and easily attainable, anoperator is apt to leave the knives in the adjusted state and continuethe cutting action which will produce an imperfect veneer where theimperfect portion of the log is encountered.

It is an object of this invention, therefore, to produce means by whichthe block and knife securing device may be eXpedi-- tiously tightened orreleased, means being also provided for limiting the movement of themeans for operating the securing device, in order that it may beprevented from striking the log or interfering with the rotation of thelog.

It is a further object of this invention to produce a block and knifeadjusting mechanism which will be of comparatively simple andinexpensive construction, and which.

may be installed on machines now in common use.

With the foregoing and other objects in view, the invention consists inthe details of construction, and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed;

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of the application wherein likecharacters denote corresponding parts in the several views, and i inwhich Figure 1 illustrates a view in perspective of a fragment of aframe of a veneer cutting machine and parts associated with Figure 2illustrates a sectional view on the line 22 of Fig. 1, omitting theknife;

Figure 3 illustrates a sectional view, on the line 33 of Fig. 2;

Figure 1 illustrates a perspective view of the clamping cam; and

Figure 5 illustrates a perspective view of the head and a portion of theshank of one of the bolts.

In these drawings, 10 denotesthe usual slotted rail or bed plate of aveneer cutting fit in the slot 17 of the bed plate, and the I heads ofthese bolts bear against the bed plate for frictionally retaining theblock in different positions of adjustment, as will presently appear.The block has a slot 18 forming a seat for the knife 19, and the saidslot is of less depth than that of the knife in order that the knifewill be clamped against the bed plate by the action of the block. I I

In the present embodiment of the invention, one or the other of thebolts 14- or 1-5 will act as a pivot for a cam lever 20, the head 21 ofsaid lever being rotatably mounted on a bolt. It is the purpose of theinventor that the cam shall be made right or left hand, according to thedesires of the user, and the head of such camwould be rotatably mountedon either of the bolts, according to the character of cam.

will act to increase or diminish the pres-v sure on the block. Thecamming action has been found in practice to efiectually retain theblock in different positions of adjustment when the cam is properly set,whereas when the cam lever is operated to reduce pressure on the block,the block will be free to slide, in order that the knife 19 associatedwith the block may be moved into certain operative relation to theotherblocks on the bed plate, or with relation to the work being cut. v

Stops or abutments 24. rise from the upper surface of the block near itsinner edge, and these ,abutments are intended to be e11- gaged by thecam lever to limit the inward oscillatory movement thereof. These abutments may be formed integral with the block, or they may consist ofstuds properly seated or otherwise secured to it, and the inventor doesnot wish to be limited with respect to this feature of the invention.

From an inspection of the drawing, it will be apparent that when thedeep portion of the cam is interposed between the plate 22 and theblock, the pressure on the block and the pull on the heads of the boltsagainst the walls of the slot may be such as to frictionally retain theblock in its adjusted position, while at the same time, forcing theknife into engagement with the bed plate to retain the parts in theirproper positions, whereas by slight oscillatory movement of the camlever to cause the interposition of the shallow portion of the cambetween the plate 22 and the block, the parts just described will bereleased to such an extent as to permit movement of the block, or theremoval of the knife from the slot of the block. If the knife needssharpening, it can be re-set to proper position by the simple insertionof the knife in the slot and the operation of the same.

I claim: j 1. In a veneer cutting machine, a bed plate having a slot,bolts having heads slidable in'the slot, a block on the bed platethrough which the bolts extend and beyond which they project, a platehaving apert-ures to receive the bolts. members for limiting th movementof the plate with relation to the face of the block, a cam operative inconjunction with either bolt and rotatably mounted thereon between thesaid plate andthe said block, and a knife held between the block and bedplate by the action of the said block and its clamping means.

2. In a veneer cutting machine, a bed plate having a slot, bolts havingheads slidableuin the slot. a block on the bed plate through which thebolts extend and beyond which they project, a plate having apertures toreceive the bolts, members for limiting the movementof the plate withrelation to the face of the block, a cam operative in conjunctionwitheither bolt and rotatably mounted thereon between the said plate and thesaid block, a knife heldbetween the block and bed plate by the action ofthe said block, and meanson the block in positions with relation to thebolts to form abutments to limit the movement of the cam with relationto either of the said bolts,

ROBERT H. FOARD.

